<!DOCTYPE>
<html>
  <head>
  <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
  <title>无标题文档</title>
  
    <script>
    
      document.write('<' + 'script type="text/javascript" src="test1.js"' + '>' + '<' + '/script' + '>');		
      document.write('<' + 'script type="text/javascript"' + '>');
      document.write('alert(n + 2);'); 
      document.write('<' + '/script' + '>');
          
    </script>
  
  </head>

  <body>
    <script type="text/javascript">
			document.write('<script type="text/javascript" src="test1.js"></script>');
			document.write('<script type="text/javascript">');
			document.write('alert(2);')		
			document.write('alert(n+2);');		
			document.write('</script>');
		
		</script>
  </body>
</html>
